GB1490652A - System for multiplexing a communication channel constituted by an optical fibre - Google Patents

System for multiplexing a communication channel constituted by an optical fibre

Info

Publication number
GB1490652A
GB1490652A GB1998/75A GB199875A GB1490652A GB 1490652 A GB1490652 A GB 1490652A GB 1998/75 A GB1998/75 A GB 1998/75A GB 199875 A GB199875 A GB 199875A GB 1490652 A GB1490652 A GB 1490652A
Authority
GB
United Kingdom
Prior art keywords
light
sources
lens
wavelengths
detectors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1998/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thomson CSF SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of GB1490652A publication Critical patent/GB1490652A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
    • G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
    • G02B6/29311—Diffractive element operating in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
    • G02B6/29365—Serial cascade of filters or filtering operations, e.g. for a large number of channels in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations
    • G02B6/29367—Zigzag path within a transparent optical block, e.g. filter deposited on an etalon, glass plate, wedge acting as a stable spacer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29371—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion
    • G02B6/29373—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion utilising a bulk dispersive element, e.g. prism

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

1490652 Photo-electric communication apparatus THOMSON - CSF 16 Jan 1975 [18 Jan 1974] 1998/75 Heading G1A Multi-plex communication apparatus comprises: a plurality of sources comprising diodes for emitting light at different wavelengths; at least one optical fibre; a plurality of photo-detectors; means independent of the photo-detectors for selecting said wavelengths; modulating means applied to the sources; and demodulating means applied to the detectors. Modulators C 10 ... C 19 , Fig. 1, controlled by signals applied to terminals V 10 ... V 1 9 , apply pulse modulation to LEDs E 10 ... E 1 9 (e.g. Aldoped Ga-As diodes), arranged to radiate in respective spaced narrow bands of wavelengths in the range 0À88-0À97 Ám. The radiation, collimated by a lens L 10 , is reflected by a mirror M 10 to pass through other mirrors M 11 ... M 19 each having a selective reflection band corresponding to the wavelength of the collimated radiation from a respective one of the other sources E 1 1 ... E 19 . The radiation thus multi-plexed is focused by a lens 101 on the input face 11 of an optical fibre 1 which transmits the light to a complementary arrangement comprising a collimating lens 102, mirrors M 20 ... M 29 , lenses L 20 ... L 29 , PIN silicon photodiodes R 20 ... R 29 and demodulators C 21 ... C 29 . The transmitting and receiving elements are so ordered that the light in any channel undergoes the same number of passages through, and reflections by, mirrors, regardless of its position. The wavelength selection may alternatively be done by filters with beam-splitting mirrors or, as in the embodiment of Fig. 3, with dispersive elements. Light from each of sources E i , E j arranged in the focal plane of a lens L 1 arrives as a parallel beam aimed at a respective angle of incidence at the face of a dispersive element 30 (e.g. a prism or diffraction grating), the respective wavelengths and incidence angles being so chosen that the light emerges from the element 30 as a single multi-coloured parallel beam which is then focused by a bus L2 in the input face 11 of the optical fibre 1. A complementary arrangement at a receiving station (not shown) sorts the light into its various wavelengths and . focuses it on to respective detectors in the focal plane of a lens. Alternatively, Fig. 4 (not shown), the steps of collimation, dispersal and focusing may be combined by a hologram in a thick medium (40) at the transmitter and a similar element at the receiver. The multiple mirror arrangement of Fig. 1 may be replaced by a thick slab of glass (51, 52), Fig. 5, (not shown) having parallel partially-transmitting faces. A light beam inclined to the surface undergoes multiple internal reflections, some of the light emerging at each point of reflection to pass through an appropriate hand-pass filter (T 1 ... T 6 ). Similarly light from each of respective sources (E 2 , E 3 ) undergoes two or more internal reflections to combine with light from a source (E 1 ) undergoing transmission through the slab. At least one source and its modulator may be exchanged for a corresponding detector and its demodulator to provide a combined transmitting and receiving station at each end of the fibre, Figs. 5 and 6, (not shown). The transmission path may comprise a bundle of fibres.
GB1998/75A 1974-01-18 1975-01-16 System for multiplexing a communication channel constituted by an optical fibre Expired GB1490652A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7401800A FR2258751B1 (en) 1974-01-18 1974-01-18

Publications (1)

Publication Number Publication Date
GB1490652A true GB1490652A (en) 1977-11-02

Family

ID=9133686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1998/75A Expired GB1490652A (en) 1974-01-18 1975-01-16 System for multiplexing a communication channel constituted by an optical fibre

Country Status (5)

Country Link
US (1) US3953727A (en)
JP (1) JPS50105002A (en)
DE (1) DE2501791A1 (en)
FR (1) FR2258751B1 (en)
GB (1) GB1490652A (en)

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DE3123448A1 (en) * 1981-06-12 1982-12-30 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR CONTROLLING THE BUS ACCESS OF A VARIETY OF DEVICES USING A BUS IN A NETWORK CONSTRUCTED WITH AT LEAST ONE OPTICAL MIXER AS A PASSIVE BUS SYSTEM, ESPECIALLY FOR MULTIPLE COMPUTER SYSTEMS
DE3127379A1 (en) * 1981-07-10 1983-01-27 Siemens AG, 1000 Berlin und 8000 München Optical network for transmitting sensor data
GB2168215A (en) * 1984-12-10 1986-06-11 Secr Defence Improvements in or relating to multiplexing and demultiplexing systems
GB2181920A (en) * 1985-10-18 1987-04-29 American Telephone & Telegraph An optical local area network employing microwave modulation techniques
EP3058627A4 (en) * 2013-10-15 2017-06-14 Elenion Technologies, LLC Operation and stabilization of mod-mux wdm transmitters based on silicon microrings

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CA1123528A (en) * 1977-07-12 1982-05-11 Elmer H. Hara Frequency division multiplexing system for optical transmission of broadband signals
US4144550A (en) * 1977-08-30 1979-03-13 Xerox Corporation Reproduction machine using fiber optics communication system
JPS54103055A (en) * 1978-01-31 1979-08-14 Nippon Telegr & Teleph Corp <Ntt> Spectrometer
IT1109751B (en) * 1978-01-31 1985-12-23 Nippon Telegraph & Telephone OPTICAL MULTIPLIER AND DEMULTIPLATOR
US4236243A (en) * 1978-04-20 1980-11-25 National Research Development Corporation Telecommunication systems
US4228349A (en) * 1978-08-28 1980-10-14 Rca Corporation III-V Direct-bandgap semiconductor optical filter
US4262362A (en) * 1978-10-18 1981-04-14 Westinghouse Electric Corp. Fiber optics duplex module
DE2851625A1 (en) * 1978-11-29 1980-06-26 Siemens Ag Optical data transmission system wavelength demultiplexer - has junctions with mirrors controlling paths to detectors mounted on narrow band filters
JPS55145445A (en) * 1979-05-01 1980-11-13 Nippon Telegr & Teleph Corp <Ntt> Optical wavelength multiple transmitting system
US4402480A (en) * 1979-05-25 1983-09-06 Udell Debra M Atmosphere modification satellite
DE2922418C2 (en) * 1979-06-01 1981-12-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Integrated services message transmission and switching system for sound, images and data
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DE3008051A1 (en) * 1980-03-03 1981-09-10 Siemens AG, 1000 Berlin und 8000 München Multiplexer or demultiplexer optical element - is transparent block containing light guide loop intersected by sloping filter and having output surface
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FR2530347B2 (en) * 1982-07-16 1986-07-04 Instruments Sa DEVICE FOR SEPARATING OR COMBINING LIGHTS OF DIFFERENT WAVELENGTHS
FR2537364A1 (en) * 1982-12-01 1984-06-08 Instruments Sa Method of transmitting information by optical fibre and device for implementing the method.
DE3324611A1 (en) * 1983-07-08 1985-01-17 Standard Elektrik Lorenz Ag, 7000 Stuttgart OPTICAL COUPLING
US4707057A (en) * 1983-07-21 1987-11-17 Honda Giken Kogyo Kabushiki Kaisha Optical switching unit
FR2553951B1 (en) * 1983-10-25 1985-12-27 Thomson Csf INFORMATION STORAGE DEVICE IN A FIBER OPTIC TRANSMISSION SYSTEM
US4880289A (en) * 1983-12-16 1989-11-14 Hitachi, Ltd. Two-way optical transmission system
JPS60184216A (en) * 1984-03-02 1985-09-19 Oki Electric Ind Co Ltd Hybrid optical multiplexer/demultiplexer
FR2570836B1 (en) * 1984-09-21 1987-11-20 Thomson Csf CIRCULATING DELAY LINE DEVICE
US4648083A (en) * 1985-01-03 1987-03-03 The United States Of America As Represented By The Secretary Of The Navy All-optical towed and conformal arrays
EP0234280A1 (en) * 1986-01-31 1987-09-02 Siemens Aktiengesellschaft Communication system light switch having three light connections
US4823357A (en) * 1986-11-10 1989-04-18 The United States Of America As Represented By The Secretary Of The Air Force Diffraction limited dichroic combiner diode laser
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US5048911A (en) * 1988-11-15 1991-09-17 Universiti Malaya Coupling of multiple laser beams to a single optical fiber
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US5066148A (en) * 1990-07-31 1991-11-19 The United States Of America As Represented By The Secretary Of The Navy Bi-directional optical transmission system for RF electrical energy
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CN104020527A (en) * 2014-06-11 2014-09-03 武汉电信器件有限公司 Multichannel integrated optical wavelength division multiplexing/demultiplexing component structure
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123448A1 (en) * 1981-06-12 1982-12-30 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR CONTROLLING THE BUS ACCESS OF A VARIETY OF DEVICES USING A BUS IN A NETWORK CONSTRUCTED WITH AT LEAST ONE OPTICAL MIXER AS A PASSIVE BUS SYSTEM, ESPECIALLY FOR MULTIPLE COMPUTER SYSTEMS
DE3127379A1 (en) * 1981-07-10 1983-01-27 Siemens AG, 1000 Berlin und 8000 München Optical network for transmitting sensor data
GB2168215A (en) * 1984-12-10 1986-06-11 Secr Defence Improvements in or relating to multiplexing and demultiplexing systems
GB2181920A (en) * 1985-10-18 1987-04-29 American Telephone & Telegraph An optical local area network employing microwave modulation techniques
GB2181920B (en) * 1985-10-18 1989-10-25 American Telephone & Telegraph An optical local area network employing microwave modulation techniques
EP3058627A4 (en) * 2013-10-15 2017-06-14 Elenion Technologies, LLC Operation and stabilization of mod-mux wdm transmitters based on silicon microrings
US9941990B2 (en) 2013-10-15 2018-04-10 Elenion Technologies, Llc Operation and stabilization of Mod-MUX WDM transmitters based on silicon microrings

Also Published As

Publication number Publication date
US3953727A (en) 1976-04-27
DE2501791A1 (en) 1975-08-07
FR2258751B1 (en) 1978-12-08
FR2258751A1 (en) 1975-08-18
JPS50105002A (en) 1975-08-19

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